DE3127141A1 - "OVERALL COUNTER" - Google Patents

Description

The invention relates generally to one. Distance ~ counter for a wheeled vehicle odidgl »and in particular on a highly compact, electric drive a distance counter with a mechanical display "

In an Iiraf t vehicle odometer according to an older proposal, a flexible shaft is used to connect the display drive mechanism of the odometer through a multi-stage reduction gear with a rotatable element © ines part of the gear train of the vehicle Lack of that it is becoming increasingly difficult to provide sufficient space in the overcrowded and cluttered R&S Xa behind the instrument panel of the vehicle and in its engine compartment to accommodate the cable due to measures such as emission control and the like Finding equipment "In an attempt to solve this problem, an attempt was made to provide an electric motor - either of the step" or of the DC motor type - to drive the mechanical display of the odometer through a suitable gearbox and to provide this motor with

IELEFOM (OS ¹ ?) 21 3004

TELBt 03-38280

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a suitable errogerigical, e.g. a series of bipolar impulses indicating the vehicle speed, to dine. Due to the need to have the engine in the neighborhood of the majority of the in the ad To provide used number wheel, however, resulted the disadvantage for this arrangement is that it is bulky and consequently difficult in the instrument panel of the vehicle was to be arranged and installed.

The invention is based on the object of creating an odometer in which the disadvantages of conventional Odometer are avoided. According to the invention, this object is achieved with one designed according to claim 1 Odometer solved, with advantageous developments and refinements of the subject matter of the invention by the features of claims 2 to 8 are characterized.

According to the invention, an electric motor is of the stepper motor type (or alternatively a DC motor) is used, which is unusually within a plurality of ringföi-migon number wheels, which indicate the distance Bear digits, is arranged. This explains the large amount of space required for a like The motor that was previously arranged externally is eliminated and, as a result, the arrangement can convey a high degree of compactness will.

Furthermore, according to the invention, a one-way clutch comes into play. advantageous to use at one end the stepper motor output shaft is arranged, and both measures prevent an indefinite (illegal) Reversal of the odometer, at the same time a rattle of the rotating energy from the motor to the number wheels Gears is prevented without affecting the compactness of the arrangement.

Another essential feature of the invention is to be seen in the fact that the motor is to be separated into two components, one of which is within the number wheels set, which is used in a Gesaint-Wegstrockenzähler, and the other within a second Ziffemrädersatses, which is in one of the first Zugcoi-dneten and this integrated daily odometer is used, is arranged. This "separation" takes place in such a way that the excitation coil (or coils) of the motor is (are) removed from one set of the number wheels, eg »B» from
the set of the total odometer, and this is (are) indicated within a second set of the daily odometer integrated in the total odometer. The division of the motor into two components allows the use of a larger hotor with an increased number of poles and increased torque output without
the need to increase the diameter of one of the
two digits, what on the other hand for the ~
assumption of a conventionally designed motor that produces the same torque output would be necessary «

The subject matter of the invention is explained with reference to the drawings. Show it:

Fig. 1 is a sectional view of an odometer

according to a first embodiment of the invention;

FIG. 2 shows a representation similar to FIG. 1, wherein
in this embodiment, however, a one-way =
coupling is used;

3 shows a sectional view of an odometer

according to the invention in a further embodiment, wherein an enlarged rotor of the electric motor within the number wheels of the total path tr ei-s and the excitation coil of the rotor
are arranged within the number wheels of the associated daily odometer »

Dei the Wegstrcckcnzähler of Fig. 1 has a. Electric motor 10 has a cylindrical soft-axis housing 12. In this case, the motor 10 is a stepper motor and has a permanently magnetic four-pole rotor Ik , which is mounted on an output shaft 16 and is firmly connected to it. In a coaxial position around the rotor and at a distance from it, a synthetic resin bobbin 18 is arranged which is closely fitted into the cylindrical housing 12 and around which an excitation coil 20 is wound. At each end of the cylindrical housing 12 there are bearings 22 and 2k which serve to support the motor output shaft 16. In a recess of the bearing 22 there is a spring 26 which rests slidably on one end of the rotor 14 in order to press it in the direction of the other bearing 24 and against it. Stator poles 28 and 30, each of which has two tapered pole elements, are arranged between the rotor Ik and the inner circumference of the bobbin 18.

The cylindrical housing 12 is mounted a speedometer on the chassis 32 which mounted on an instrument panel or the like * or part may be of such a "A plurality of digit wheels 3k, in the case shown there are seven, of the cylindrical housing rotatably mounted on the outer circumference . As can be seen from FIG. 1, the housing 12 is stepped at one end in a suitable manner in order to hold the number wheels on it, while the other end receives a removable retaining ring 36.

A series of pinions or pinions 38, in in this case there are six, each arranged so that each with two adjacent number wheels in the Combs way that with a full revolution of one then the next is rotated over a distance that is sufficient to insert the next printed digit into the Bring display window (not shown).

A gear train 40 operatively connects the output shafts 16 of the motor 10 with a first of the number wheels 3'l »This gear train 40 contains one at one end the output shaft attached worm 42, a drive pulley 44 with attached worm wheel (oblique = toothed spur gear) 46 and attached worm 40, wherein the screw 42 is arranged so that si © with the worm wheel 46 is engaged and it includes one Input wool 50 with a worm gear 52 at one end, that combs with the snail 48, as well as with a forehead cream « wheel 54c The drive means are on the input shaft 50 38 rotatably mounted »The spur gear 54 is with the first of the number wheels 34 in engagement

In operation, the coil is connected via connections (not shown) 20 is supplied with a suitable excitation signal, which in this If it has the form of a bipolar square wave pulse ο This turns the rotor 14 into a step-by-step Dre => brought today = This rotation is transmitted via the Getx reference 4θ, so that the first of the number wheels is a Rotation executes, which in turn drives the next digit xirad with a full rotation in the sequence and so on ο

In the embodiment according to Figo 2 the Abtriefoswel « bearing 24 has been partially replaced by a bearing 56, which has a one-way function »This one-way bearing 56 naturally prevents any undesired and / or impermissible reversal of the direction of rotation of the distance = counter and at the same time serves to prevent any rattling in the gear train 40, while it is at the Embodiment of Figo 1 achieved compactness in None. Impaired in any way = The rest of the construction and operation of this embodiment is the first

Ausfühz-uugsf oi'in identical, so that another Explanation is superfluous.

In the Ausfülirungsform shown in Fig. 3, the Erf iiiduiigsgccstand integrated total and daily or iieise odometer on.

In order to drive the two odometers To deliver sufficient torque, the electric motor 10 is "divided" into two components, i.e., a first cylindrical (non-magnetic) housing 120 of the total odometer A houses the rotor and stator poles, while a second cylindrical (non-magnetic) Gchtiuse 6θ of the daily odometer B the excitation coil and the body of the player receives the first Embodiment arranged coaxially around the rotor

Dec structure of the total odometer A is essentially the same as in the previous embodiment, but with the exception that the rotor 62 has six poles and that the two stator poles 64, 66 of the so-called "claw-tooth" type ("claw tooth" type), each having three tapered or tooth-like shaped pole pieces. One engine of this type is shown in U.S. Patent 5 5 ^ 1 365 which are incorporated herein by reference for explanation.

The first and second cylindrical housings 120 and 60, respectively, are attached to the chassis (not shown) of the speedometer. The second housing 60 closely houses a bobbin 68 on which a bobbin 70 (or bobbins) is (are) wound. Magnetically conductive yokes 72, 7k are arranged so that they extend from each

3127H1

axial linde of the arrangement consisting of coil 70 and coil body 68 extend into the first cylindrical housing, whereby they establish a magnetic connection between the coil 70 and the stator poles 64, 66. With this arrangement, when the coil 70 is excited, the energy generated thereby is transmitted to the stator poles 64, 66 via yokes 72, 74. This excitation of the yokes causes the rotor 62 to rotate. Furthermore, due to the tapering present on each stator pole segment, the rotor is caused to rotate only in a single rotating device.

A gear train 76 provides a simultaneous drive = » connection between the rotor 62 and the two odometers A and B here »The gear train to the day» = V / cgstreckerizahlor B naturally contains a back- Positioning system, which has been omitted here for the sake of clarity and simplicity. The gear train most often a drive shaft 78 with a worm wheel 80 and augers 82, 84 dai-on. The worm wheel 80 is in engagement with a screw 86, which at dor Ab = Drive shaft of the rotor 62 is attached, while the end-side worms 82 and 84 with the worm wheel bzwo 90 comb that on the respective input shafts 92 or 94 of the odometer A and B are attached » These input shafts 92, 94 have spur gears 54, 'the in turn, drive the first number wheel of the two distances = counter. Drive pinions 58 drive that in a row next number wheel and so on as in the case of the first execution for tn.

If desired, a one-way clutch or a one-way bearing can be used as in the arrangement of FIG. 2 for the bearing of the output shaft of the rotor 62 are used, thereby

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as in the previous case, an undesired reversal of the number wheels is prevented, while at the same time any Rattling in the gear train is prevented.

The invention provides a highly compact odometer, which is mainly due to the
Arrangement of the electric motor in whole or in part within the ring-shaped number wheels of the mechanical display and on the connection of the motor with .den number wheels by a simple worm / worm gear train od-tjgl. is based.

Claims (8)

GRÜNECKER, KINKELDEY, STOCKMAIR & PARTNER ^: PATENT LAWYERS Λ GROMECKER. Din. - » DR H KINKEtOEY M-. ■ --α DR W-STOCKMAlR. i »r-. μο, .λε ! <■■ 'K SCHJMANH. ■■■> ■■ " P H. JAKOB, you. -.rvs DR G- BEZOLO, dipi.-che « W. MASTER. oiFi. -ing H HILGERS. fipu no DR. H. MEYER-PLATH. cwH.-ir.-o Kanto Seiki Co., Ltd » No. 2-1910, Nisshin-cho, Omiya City, Japan BODO MUNICH 22 MAXlMiUANSTRASSE 43 July 9, 1981 P 16 373 Odometer Claims / l ^ \ Distance counter, characterized by a hollow housing (12; 120), by a plurality
of ring-shaped, on the hollow housing rotatably aage = brought number wheels (3 ^) ₅ through a rotor (ik; with. a shaft (ΐβ) arranged in the hollow housing through a connecting the shaft and the number wheels, the number wheels depending on the Rotation of the rotor rotating gear train and by the rotation of the rotor as a function of a signal indicative of the vehicle speed inducing device (20, 28, 30; 64, 66, 70, 72, 74) ο TELEPHONE [0-1 32 26 S3 TELEX Ο3-3935Ο TEUEG "AMME MONAPAT" 3127 St. 2. V / egs treclccnzähler according to claim I ₁ characterized by a second hollow housing (60), by a plurality of second, on the second hollow housing rotatably mounted number wheels (54) and by a second gear train connecting the rotor shaft to the second number wheels . 3 odometer according to claim 1, characterized in that that the inducing device is a coil (20) which can be excited by the signal and which is located in the first hollow housing is arranged coaxially around the rotor, and a plurality of coaxially around the rotor around and within the coil arranged stator poles (28, 30). 4. odometer according to claim 2, characterized in that that the inducing means a plurality of within the first hollow housing (120) arranged stator poles (64,66), one of the Signal excitable coil (70) arranged within the second hollow housing (6o) and magnetic, from the coil to the stator pole extending, a magnetic connection between the coil and the A plurality of the stator poles producing yokes (72, 74) comprises. 5. odometer according to claim 1, g e k e η η-records by a one-way clutch arranged in the first hollow housing and supporting the rotor shaft (56). 6. odometer according to claim 1, characterized in that the Getriß reference (40) has a first screw (42) _{t attached to the rotor shaft (l6)} one engaged with and by it driven worm wheel (46), a second worm rotatable synchronously with the first worm wheel (46) (40), a second, with the second worm (48) in engagement and driven by this Worm wheel (52), one firmly connected to the second worm wheel and rotatable synchronously with it Input shaft (50), one attached to the input line Spur gear (54) having a first number wheel from the plurality of first number wheels combs, and a plurality of drive pinions "(38)» the two adjacent number wheels with each other connect so that for a given rotation of the one wheel rotates the other wheel by a predetermined amount. 7 »V / egstreckenzähler is characterized according to claim 2, characterized .eke g-η η · that (? Ö) of the second gear train, a third, synchronously with the first worm wheel (8O) and the second screw (82) rotatable auger (84) , a third worm wheel (90) which is in engagement with the third worm and is driven by it, a second input shaft (94) fastened to the third worm wheel and rotatable synchronously therewith, a second spur gear (54) carried by the second input shaft , which meshes with a first number wheel of the second plurality of number wheels, and a second plurality of drive pinions (38), each of which connects two adjacent number wheels, so that when one number wheel is rotated by a predetermined amount, the other one rotation by a predetermined . Amount executes, includes. 8. Wegstrcckenzähler according to claim I ₁ characterized by a spring (26) which acts on the liotor within dos first hollow housing in an axial seal.